Nelzsti

I plan on doing a few track days so been advised to fit a baffled sump. All i can find is the RCM one at about £600 or this https://www.tuningdevelopments.co.uk...oducts_id=2537 which is cheaper and come with a pick up

I would have thought they would be someone modding the OEM ones cheaper?

Cars going in soon so i need to get something sorted

Henrik

iTrader: (5)

Hmm, my engine builder recommended a slightly overfilled twinscroll sump (which is the same as the ej25 sump, afaik), as it has better oil control than the single scroll 2001-2005 2.0 sump.

I didn't have any problems with oil pressure (from what I could tell from the gauges at least) at Brands with this method. I'm not massively fast, but I did a couple of sub 60 second laps, which isn't absolutely terrible.

If you're on road tyres, you most likely will be OK with a twin scroll sump IMO, unless you are very good at driving.

Henrik

iTrader: (5)

i should also add, if I was looking at a sump upgrade I would rather have a KillerB sump than the Moroso sump (I haven't ran either, but feedback seems very good for the KillerB sump (for a wet sump, at least)).

Nelzsti

Thats interesting , i did read somewhere the later model had a better sump design,,, I have got road/track tyres fitted though

Henrik

iTrader: (5)

I'm using Federal RSR-595 tyres (though to be fair, they are about 10 years old, haha)

johnfelstead

I ran on super soft rally slicks on sprints for years on my widetrack blob, far stickier than your normal trackday tyre.
Sump was stock twin scroll fitted with a Cosworth baffle plate and an RCMS return to sump oil breather system.
The big problem with the Subaru engine is the heads fill up with oil and empties the sump, fit a return to sump system and that problems goes away (as does breathing in oil vapour into the inlet system that lowers the effective octane of the fuel, leading to more chance of det).

I ran for years on track with a completely stock sump setup on my STi5 Type RA, but only ran it on normal road tyres.

You have to tailor the oil system to the car and tyre, on the 750BHP TA car i drive it is still wet sumped, but has a pretty developed setup by Chevron.

Henrik

iTrader: (5)

How does that return to sump system work? Is it assisted somehow, or do you mean some sort of nipple+hose on the cam covers (or elsewhere) to passively return oil to the sump?

IainMilford

iTrader: (15)

I’ve been running the RCM group N baffled sump and track attack catch can system for years now and my pressures are fine when running on track

johnfelstead

You need a catch can system that mounts to the chassis, inlet is from the cam covers and a return pipe feeds the sump via fittings added to the sump.

https://rogerclarkmotorsport.co.uk/s...%20catch&get=&

Nelzsti

Bought a 07 sump and a RCM baffle plate and an RCM pick up pipe. From what i can see this should keep me going for a bit, it was about £300 quid all in

stockcar

original Twinscroll cars from 03-05 use a slightly different design to the later 'shared' version............

IMO over-filling engines is a very bad idea...........

original single scroll sumps lend themselves to being modifed in the same way that Prodrive did for the early grpN cars

Henrik

iTrader: (5)

Do you have any improvements to the twin-scroll sump/ej25 sump? Or is dry-sump the next step?

stockcar

yes we do a 2003> Prodrive style grpN spec ali inserted sump set-up